Hinge structure for a closure member

ABSTRACT

A hinge structure for adjustably and pivotally supporting a door upon a door frame, said hinge structure including a support bracket means mounted on the frame and pivot pin means mounted on the door for engagement with said bracket means. The engaging surfaces of the pivot pin means and bracket means have cooperating structure for yieldably resisting pivotal movement between the pivot pin means and the bracket means. The pivot pin means is threadedly mounted in a sleeve which is secured within the edge of the door so that pivotal movement of the door is effected by rotational movement between the pin means and the sleeve means.

United States Patent McLeland et a1.

[ HINGE STRUCTURE FOR A CLOSURE MEMBER [72] Inventors: Don H. McLeland;Billy G. Harris,

both of Fort Worth, Tex.

[73] Assignee: Overhead Door Corporation, Dallas,

Tex.

22 Filed: Jan.25, 1971 211 Appl.No.: 109,238

[52] US. Cl. ..16/129, 49/388, 160/206, 16/134 [51] Int. Cl. ..E05d 7/04[58] Field of Search ..160/206, 199; 16/129, 132, 16/134; 49/388 [56]References Cited UNITED STATES PATENTS 3,410,330 11/1968 Matyas..160/206 51 Aug. l5, 1972 2,248,372 7/1941 May ..16/132 X PrimaryExaminer-Kenneth Downey Attorney-Woodhams, Blanchard and Flynn 5 7]ABSTRACT A hinge structure for adjustably and pivotally supporting adoor upon a door frame, said hinge structure including a support bracketmeans mounted on the frame and pivot pin means mounted on the door forengagement with said bracket means. The engaging surfaces of the pivotpin means and bracket means have cooperating structure for yieldablyresisting pivotal movement between the pivot pin means and the bracketmeans. The pivot pin means is threadedly mounted in a sleeve which issecured within the edge of the door so that pivotal movement of the dooris effected by rotational movement between the pin means and the sleevemeans.

2 Claims, 5 Drawing Figures S 3 a P 0 5 x w mw W M 3 2 W 3 5 1 WM U 8 Ka 3 J W 5 y W 00 6 7 3 a fl mum m 9 2 a 3 m 4m v m I aw. w B V m i a w.L i 2 mm N a 6 TI 1 2 Mm firms a a a w. n

HINGE STRUCTURE FOR A CLOSURE MEMBER FIELD OF THE INVENTION Thisinvention relates in general to a hinge structure for an upright closuremember and, more particularly, to a type thereof having means forvertically and horizontally adjusting the position of the closure memberrelative to its supporting frame structure.

BACKGROUND OF THE INVENTION Pivot mechanisms for supporting doors aresome of the oldest and most well known mechanical devices. However, noone has previously successfully provided an inexpensive and easilyadjustable hinge structure for pivotally supporting a closure member,for example a door, whereby said door can also be easily and quicklyremoved from or installed in its normal position of operation.

Persons acquainted with installation and manufacture of doors, such asthose used in folding door units, are well aware of the difficultiesencountered when an attempt is made to install a pair of pivotallysupported doors in a door frame so that they are accurately aligned bothvertically and horizontally with the frame and with each other. That is,normally the installation of such doors is effected after a frame iscompleted and, in fact, may be effected by somebody other than thecarpenter who built or installed the door frame structure. In spite ofthe efforts of the carpenter to build the door frame accurately and withthe best available materials, changes often occur in the shape of thedoor frame after it is completed. Moreover, even though the installationof the doors in the door frame is effected with great care, it is almostimpossible to be sure that the doors will remain accurately alignedafter the installation is complete unless some provision is made in themounting or hinge structure for adjustment of the door both verticallyand laterally.

Heretofore, a common method of effecting vertical adjustment of apivoted door was to threadedly insert the pivot pin into the door(usually at the lower edge thereof) and provide a support bracket forpivotally supporting the lower end of the pivot pin. However,particularly where the door is of average or larger size, the pivotalengagement between the pin and the support bracket frequently becomesobstructed by dirt or damage so that the threaded pivot pin is caused torotate with respect to the door, often unidirectionally in smallincrements, until the door is obviously out of alignment, even to thepoint of jamming the door against the frame. Accordingly, it thenbecomes necessary to readjust or realign the door.

However, readjusting the position of the door is not as simple as itappears. Each time the pivot pin must be adjusted with respect to thedoor, it tends to increase the size of the opening in the door whichreceives the pivot pin and, accordingly, this increases the changes ofmore frequent subsequent readjustments, due to a jammed pivot. Attemptshave been made to press sleeves in the door structure in order tominimize wear when adjustment is required and, generally speaking, sucharrangements have proven satisfactory for reducing wear. However, thesedevices have not eliminated the source of the problem, namely, jammingat the pivotal contact surfaces with resultant turning of the pivot pinrelative to the door.

In the course of examining the problem, it became apparent that, in theaforesaid conventional pivoted hinge structure, all of the support ofthe door by the hinge structure was concentrated on a very small pivotcontact area. Also, the pivot contact area was constantly exposed todirt and damage. On the other hand, if this pivot contact area could betransferred, enlarged, and protected, the source of the existing problemwould be avoided. As will be developed hereinafter, this end wasaccomplished by transferring the pivot contact area from a pivotalengagement between the pivot pin and its support bracket to a pivotalengagement between the pivot pin and a door-mounted sleeve in which thepivot pin is threadedly received. In other words, the previous problemof relative movement between door and pivot pin, which was to beavoided, would now be used to advantage.

Accordingly, a primary object of this invention is the provision of apivot-type hinge construction for a door whereby the pivotal movement iseffected between the hinge pin and a member, such as a sleeve, mountedin the door with which the hinge pin is threadedly engaged so that thearea of the relatively movable hinge surfaces is relatively large and isprotected from dirt and damage.

A further object of this invention is the provision of a hingemechanism, as aforesaid, in which the rotational position of the hingepin relative to its supporting bracket can be changed easily in order toadjust the elevation of the door with respect to its frame.

A further object of this invention is the provision of hingeconstruction, as aforesaid, having means for adjusting the doorhorizontally of its frame structure.

Other objects and purposes of this invention will become apparent topersons familiar with door hinge constructions upon reading thefollowing descriptivematerial and examining the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a broken fragment of a doorand door frame including a hinge structure embodying the invention.

FIG. 2 is an exploded perspective view of said hinge structure.

FIG. 3 is an enlarged, sectional view of the hinge structure.

FIG. 4 is a sectional view substantially as taken along the line IV-IVin FIG. 3.

FIG. 5 is a sectional view taken along the line V-V of FIG. 3.

For convenience in description, the terms upper,

lower, right, left and words of similar import will have reference tothe invention and the door associated therewith as appearing in FIG. 1.The terms inner, outer and derivatives thereof will have reference tothe geometric center of said hinge structure and parts associatedtherewith.

SUMMARY OF THE INVENTION the threaded sleeve and the threaded hinge pin.The hinge pin is releasably but nonrotatably supported on a bracketmember fixedly secured to the door frame. The hinge pin and bracket havecooperating engaging surfaces which prevent rotation of the hinge pinduring normal swinging movement of the door, but which, due to theprovision of a releasable detent-like structure provided between thesupporting surfaces, permit selected rotation of the hinge pin relativeto the bracket for permitting adjustment of the vertical position of thedoor relative to the surrounding door frame.

DETAILED DESCRIPTION FIG. 1 illustrates a portion of a substantiallyconventional closure member or door 11 positioned within an openingdefined by a door frame 12, which door frame is secured to and disposedwithin an opening provided in a wall or partition 13. The door 11 has anupper corner thereof pivotally interconnected to the frame 13 by meansofa conventional pivot or hinge device 14. A combined support and hingestructure 16 is mounted on the frame 13 adjacent the lower corner of thedoor 11 for pivotally supporting the door 11. The hinge structure 16,which comprises the present invention, cooperates with the hinge device14 for defining a substantially vertically extending pivot axis aroundwhich the door 11 can freely swing or pivot relative to the frame 12.

The hinge structure 16 includes support means 17 adapted to be securedto the door frame 12 and pivot means 18 connected to the door 11 andengaged with the support means 17. The support means 17 includes anL-shaped bracket 21 having substantially vertical and horizontal legs 22and 23, respectively. The vertical leg 22 is provided with a pluralityof conventional openings or slots 24 through which screws 25 arereceived for securing the bracket 21 to the frame 12.

The horizontal bracket leg 23 has a downwardly opening channel-shapedefined by flanges 26 disposed adjacent the opposite longitudinal edgesthereof. The horizontal leg 23 is also provided with a pivot support 27thereon, which includes a bolt 28 having its hexagonal head 30 disposedadjacent the upper surface of the leg 23. The bolt 28 has a threadedshank 29 which extends downwardly therefrom through an elongated slot 31formed in the leg 23. A hexagonal lock nut 32, which is disposed belowthe leg 23 and nonrotatably held within the channel defined by the sideflanges 26, is threadably engaged on the shank 29 for securing the bolt28 in a stationary position relative to the bracket 21. The slot 31provided in the horizontal leg 23 permits the pivot support 27 to beselectively adjusted longitudinally of the leg during initialinstallation or thereafter to insure proper alignment of the door or itshinge axis. The slot 31 also has a lateral width slightly greater thanthe width of the threaded shank 29 for permitting limited lateraladjustment of the support means.

The bolt 28 is provided with an axial opening 33 and a substantiallyflat upper support surface 34. A plurality of diametrically disposedgrooves 36 are provided in the surface 34. The grooves 36 eachpreferably have an approximately V-shaped cross section. In thedisclosed embodiment, as illustrated in FIG. 2, the bolt head 30 hasthree intersecting grooves 36 which are preferably uniformly angularlyspaced and thereby form six groove segments disposed substantiallyuniformly and radially around the central opening 33.

The bolt head 30, being hexagonal, for example, can be engaged by aconventional wrench for rotating the bolt relative to the leg 23 forsecuring the bolt 28 relative to the bracket leg. However, the nut couldbe provided with a rectangular or other configuration suitable forgripping by a tool. The lock nut 32, on the other hand, is preferably ofa size such that it substantially totally occupies the space between theside flanges 26 so that the nut 32 will be nonrotatably held between theflanges, whereupon no additional tool is necessary for holding the locknut when the bolt 28 is turned.

The support means 18 includes a sleeve 41 which is adapted to bedisposed within a vertical bore 42 formed in the lower corner of thedoor 11. The sleeve 41 includes an annular flange 43 adjacent the lowerend thereof adapted to abut against the lower edge of the door. Thesleeve 41 also has a plurality of spaced and similar spiral ribs 44,which ribs project therefrom and penetrate into the material of the doordefining the bore 42 for nonrotatably securing the sleeve 41 relative tothe door 1 1.

The sleeve 41 is provided with a threaded opening 46 extendingtherethrough for threadably receiving a threaded hinge pin 47. The hingepin 47 includes an elongated threaded shank 48 which is engaged with thesleeve 41 and, in this embodiment, normally extends from both ends ofthe sleeve to insure that the hinge pin will have adequate threadedengagement with the sleeve 41 over a substantial range of verticaladjustment of the door 11.

The hinge pin 47 is provided adjacent the lower end thereof, with anenlarged adjustment head 49, which is positioned below the lower edge ofthe door and is disposed for engagement with the pivot support 27. Theadjustment head 49 is provided with a flat lower surface 51 from which acentral pin-like projection 52 extends downwardly beyond the lowersurface 51. The pin-like projection 52 has a diameter slightly smallerthan the diameter of the opening 33 and is adapted to be disposed withinthe opening 33 when the bearing surface 51 engages support surface 34.The pin-like projection 52, when disposed within the opening 33, thusprevents undesired lateral movement of the hinge pin, hence of the door,relative to the frame.

The hinge pin adjustment head 49 has a plurality of radially disposedribs 53 which project downwardly from lower bearing surface of the head49. The six ribs 53 have a V-shaped cross section and they are arrangedso that they are snugly received into the cooperating grooves 36 whenthe hinge pin bearing surface 51 is disposed in bearing engagement withthe upper support surface 34.

OPERATION While the operation of the hinge construction described abovewill be apparent from such description to persons acquainted withdevices of this type, a brief summary of the operation will be givenhereinafter for convenience.

When the door 11 is initially installed within the opening defined bythe frame 12, the pivot support 27 is adjusted longitudinally and/orlaterally with respect to the lower bracket arm 23 so that it isproperly aligned with the upper hinge device 14. The bolt 28 is thenrotated into firm engagement with the bracket arm 23.

The sleeve 41 is fixedly secured within the door and the hinge pin 47 isthreadably received within the insert 41. The door 11 is then mountedwithin the opening defined by the door frame by first engaging thehingedevice 14 and then locating the pivot means 18 directly above the pivotsupport 27. The door is then lowered until the pin-like projection 52extends into the opening 33 and the lower bearing surface 51 is inbearing engagement with the upper support surface 34. A slight pivotingmovement of the door may be required to position the ridges 53'withinthe grooves 36. When the door is disposed in this position, most of itsweight will be transmitted downwardly through the hinge pin 47 onto theupper support surface 34. This downwardly directed force will besufficient to maintain the adjustment head 49 of the hinge pin innonrotatable engagement with the bolt 28, whereby relative rotation willoccur between the hinge pin 47 and the sleeve 41 when the door ispivoted.

During normal horizontal swinging movement of the door 11, relativepivotal movement will occur between the sleeve 41 and the threaded hingepin 47. However, the hinge pin 47 can be rotated relative to the bolt 28for adjustment purposes.

The swinging movement of the door will cause a slight vertical movementof the door, due to the pitch or lead of the cooperating threads.However this vertical movement of the door is so small that it isinsignificant.

If it should become necessary to adjust the vertical position of thedoor 11 relative to the surrounding frame 12, then the door 11 will beheld against swinging, while the head 49 is engaged and turned by awrench. The torque applied to the hinge pin 47 will be sufficient tocause the ridges 53 to be cammed upwardly out of the grooves 36,whereupon the hinge pin 47 can then be selectively rotated a desiredamount, which rotation of the hinge pin 47 will cause it to be threadedinto or out of the stationary sleeve 41, depending upon the direction ofrotation of the hinge pin. Thus, rotation of the hinge pin will changethe location of the hinge pin relative to the door, which in turnresults in the vertical adjustment of the door.

During the above rotational adjustment, the pin-like projection 52remains positioned within the opening 33 so as to prevent the hinge pinfrom being axially disconnected from the pivot support. Further, due tothe provision of the grooves 36 and ribs 53, rotation of the hinge pin47 will produce a clicking sound or fee] which will enable the personperforming the adjustment to readily gauge the degree of adjustmentbeing accomplished.

While the disclosed embodiment of the invention utilizes three groovesand ridges extending diametrically across their respective surfaces(which result in six equally spaced ridge and groove segments), it willbe readily recognized that other members and arrangements of grooves andridges could be furnished for the same purposes. Moreover, while thedisclosed embodiment has the ridges on the hinge pin and the grooves onthe bolt head, the relative positions could be reversed withoutexceeding the scope of the invention.

While the invention includes spiral-like ridges 44 on the sleeve 41 forsecuring same within the door, it will be readily apparent that numerousother types of structure could be provided for this purpose. Forexample, radial teeth on the sleeve or a plurality of axially extendingspikes on the flanges could penetrate the door for nonrotatably securingthe sleeve to the door.

While the drawings illustrate the invention in association with a singleswingable closure device or door 11, said door could be one of two ormore panels hingedly connected along their vertical edges. Further, thehinge structure 16 is particularly suitable for use with closure deviceswhich possess a pair of swingable doors mounted upon the opposite sidesof a door frame, which doors must be accurately aligned both verticallyand horizontally with the frame and with each other. If the pairs ofdoors are of the bifold type, which are used extensively in homes andcommercial buildings, the invention disclosed herein is especiallyuseful.

Although a particular preferred embodiment of the invention has beendisclosed in detail for illustrative purposes, it will be recognizedthat variations or modifications of the disclosed apparatus, includingthe rearrangement of .parts, lie within the scope of the presentinvention.

The embodiments of the invention in which an exclusive property orprivilege is claimed are defined as follows:

l. A hinge structure for pivotally supporting and adjusting a closuremember, such as a door, on an adjacent frame structure, comprising:

bracket means adapted to be secured to said frame structure near thelower end thereof, said bracket means including a fixed support portionhaving an upwardly facing support surface adapted to be disposed below aportion of said closure member;

internally threaded means adapted to be nonrotatably secured to saidportion of said closure member in an axially upright position adjacentsaid bracket means;

pivot pin means having a threaded portion in threaded engagement withsaid threaded means for permitting free relative rotation therebetween,said pivot means also including enlarged head means disposed adjacentthe lower end thereof and positioned downwardly from said internallythreaded means;

cooperating guide means on said pin means and said bracket means forholding said pin means and said bracket means in pivotal relationship;

said cooperating guide means including a pinlike projection fixedlyconnected to one of said bracket means and said pin means and asubstantially cylindrical recess formed in the other of said bracketmeans and said pin means, said pinlike projection being received in saidrecess for permitting free rotational movement of said pin meansrelative to said bracket means around the axis of said pin means whilepreventing relative lateral displacement therebetween; and engageablepositioning means coacting between said pin means and the supportportion of said bracket means for yieldably resisting relative pivotalmovement between said pin means and said bracket means during normalpivotal movement of said closure member relative to said frame structureso that pivotal movement of said closure member relative to said framestructure is effected by relative pivotal movement between said pivotpin means and said threaded means;

said positioning means coacting between the upper surface of saidsupport portion and the lower surface of said head portion and includinga plurality of vertical camlike projections formed on one of saidsurfaces and a plurality of vertically disposed recesses formed in theother surface adapted to receive said projections therein, saidprojections on said one surface being angularly spaced from one anotherto define relatively planar support areas of substantial magnitudetherebetween, and said recesses as formed in said other surface alsobeing substantially angularly spaced from one another to definerelatively planar support areas of substantial magnitude therebetween,whereby said support areas of said surfaces are normally disposed inengagement with one another during normal usage of said hinge structure.

2. A hinge structure for pivotally supporting and adjusting a closuremember, such as a door, on an adjacent frame structure, comprising:

bracket means adapted to be fixedly secured to said frame structure nearthe lower end thereof, said bracket means including a substantiallyhorizontal flange having an elongated slot therein;

pivot support means positioned on said flange and including meansextending into said slot, and means coacting with said pivot supportmeans. for releasably securing said support means to said flange at anyselected position while permitting said pivot support means to beadjusted lengthwise of said slot;

internally threaded means adapted to be nonrotatably secured to saidportion of said closure member in an axially upright position adjacentand above said flange; pivot pin means having a threaded portion inthreaded engagement with said threaded means for permitting freerelative rotation therebetween;

said pivot pin means including an enlarged head portion providedadjacent the lower end thereof and positioned directly above said pivotsupport means, said head portion having a lower bearing surface adaptedto be disposed in bearing engagement with the upper bearing surface ofsaid pivot support means;

cooperating guide means on said pin means and said pivot'support meansfor holding said pin means and said pivot support means in pivotalrelationship;

said cooperating guide means including a pinlike projection coaxiallyaligned with said pin means and fixedly connected to one of said pivotsupport means and said pin means, and a substantially cylindrical recessformed in the other of said pivot support means and said pin means, saidpinlike projection being freely rotatably received in said recess forpermitting free rotational movement of said pin means relative to saidpivotal support means about the axis of said pin means while preventingrelative lateral displacement therebetween; and

releasable lock means coacting between said pin means and said supportmeans for yieldably opposing relative pivotal movement between said pinmeans and said support means during normal pivotal movement of saidclosure member relative to said frame structure, the pivotal movement ofsaid closure relative to said frame structure being effected by relativepivotal movement between said pivot pin means and said threaded means;

said lock means including a plurality of vertically projecting ridgesprojecting outwardly from one of said bearing surfaces, said ridgesbeing angularly spaced from one another and extending substantiallyradially relative to the longitudinal axis of said pin means, saidprojections being substantially angularly spaced from one another todefine substantially planar support areas of substantial magnitudetherebetween;

said lock means further including a plurality of vertical recessesformed in the other of said bearing surfaces, said recesses extendingsubstantially radially relative to the longitudinal axis of said pinmeans and being substantially angularly spaced from one another todefine substantially planar support areas of substantial magnitudetherebetween;

whereby said vertical ridges normally extend into

1. A hinge structure for pivotally supporting and adjusting a closuremember, such as a door, on an adjacent frame structure, comprising:bracket means adapted to be secured to said frame structure near thelower end thereof, said bracket means including a fixed support portionhaving an upwardly facing support surface adapted to be disposed below aportion of said closure member; internally threaded means adapted to benonrotatably secured to said portion of said closure member in anaxially upright position adjacent said bracket means; pivot pin meanshaving a threaded portion in threaded engagement with said threadedmeans for permitting free relative rotation therebetween, said pivotmeans also including enlarged head means disposed adjacent the lower endthereof and positioned downwardly from said internally threaded means;cooperating guide means on said pin means and said bracket means forholding said pin means and said bracket means in pivotal relationship;said cooperating guide means including a pinlike projection fixedlyconnected to one of said bracket means and said pin mEans and asubstantially cylindrical recess formed in the other of said bracketmeans and said pin means, said pinlike projection being received in saidrecess for permitting free rotational movement of said pin meansrelative to said bracket means around the axis of said pin means whilepreventing relative lateral displacement therebetween; and engageablepositioning means coacting between said pin means and the supportportion of said bracket means for yieldably resisting relative pivotalmovement between said pin means and said bracket means during normalpivotal movement of said closure member relative to said frame structureso that pivotal movement of said closure member relative to said framestructure is effected by relative pivotal movement between said pivotpin means and said threaded means; said positioning means coactingbetween the upper surface of said support portion and the lower surfaceof said head portion and including a plurality of vertical camlikeprojections formed on one of said surfaces and a plurality of verticallydisposed recesses formed in the other surface adapted to receive saidprojections therein, said projections on said one surface beingangularly spaced from one another to define relatively planar supportareas of substantial magnitude therebetween, and said recesses as formedin said other surface also being substantially angularly spaced from oneanother to define relatively planar support areas of substantialmagnitude therebetween, whereby said support areas of said surfaces arenormally disposed in engagement with one another during normal usage ofsaid hinge structure.
 2. A hinge structure for pivotally supporting andadjusting a closure member, such as a door, on an adjacent framestructure, comprising: bracket means adapted to be fixedly secured tosaid frame structure near the lower end thereof, said bracket meansincluding a substantially horizontal flange having an elongated slottherein; pivot support means positioned on said flange and includingmeans extending into said slot, and means coacting with said pivotsupport means for releasably securing said support means to said flangeat any selected position while permitting said pivot support means to beadjusted lengthwise of said slot; internally threaded means adapted tobe nonrotatably secured to said portion of said closure member in anaxially upright position adjacent and above said flange; pivot pin meanshaving a threaded portion in threaded engagement with said threadedmeans for permitting free relative rotation therebetween; said pivot pinmeans including an enlarged head portion provided adjacent the lower endthereof and positioned directly above said pivot support means, saidhead portion having a lower bearing surface adapted to be disposed inbearing engagement with the upper bearing surface of said pivot supportmeans; cooperating guide means on said pin means and said pivot supportmeans for holding said pin means and said pivot support means in pivotalrelationship; said cooperating guide means including a pinlikeprojection coaxially aligned with said pin means and fixedly connectedto one of said pivot support means and said pin means, and asubstantially cylindrical recess formed in the other of said pivotsupport means and said pin means, said pinlike projection being freelyrotatably received in said recess for permitting free rotationalmovement of said pin means relative to said pivotal support means aboutthe axis of said pin means while preventing relative lateraldisplacement therebetween; and releasable lock means coacting betweensaid pin means and said support means for yieldably opposing relativepivotal movement between said pin means and said support means duringnormal pivotal movement of said closure member relative to said framestructure, the pivotal movement of said closure relative to said framestructure being effected by relative pivotal movement between said pivotpin means and said threAded means; said lock means including a pluralityof vertically projecting ridges projecting outwardly from one of saidbearing surfaces, said ridges being angularly spaced from one anotherand extending substantially radially relative to the longitudinal axisof said pin means, said projections being substantially angularly spacedfrom one another to define substantially planar support areas ofsubstantial magnitude therebetween; said lock means further including aplurality of vertical recesses formed in the other of said bearingsurfaces, said recesses extending substantially radially relative to thelongitudinal axis of said pin means and being substantially angularlyspaced from one another to define substantially planar support areas ofsubstantial magnitude therebetween; whereby said vertical ridgesnormally extend into said vertical recesses for nonrotatably connectingsaid pivot pin means and said support means whereby said pivot pin meansis thus maintained stationary relative to said bracket means, said pivotpin means being manually rotatable relative to said support meanswhereby said ridges are cammed out of said recesses so that said supportareas are spaced from one another to thus permit said pin means to bethreaded into or out of said threaded means for adjusting the verticalposition of said closure member relative to said frame structure.